Norain's answer to Athena's Primary 5 Maths Decimals Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Answer = 4
Date Posted:
5 years ago
Never explain
The tutor has explained it. Multiplying by 100 is a jump of two decimal places to the right.
Multiplying by 10 is a jump of one decimal place to the right.
Multiplying by 100 is a jump of two decimal places to the right.
Multiplying by 1000 is a jump of three decimal places to the right.
And so on.
Dividing is going the other way.
Dividing by 10 is a jump of one decimal place to the left.
Dividing by 100 is a jump of two decimal places to the left.
Dividing by 1000 is a jump of three decimal places to the left.
And so on.
Multiplying by 10 is a jump of one decimal place to the right.
Multiplying by 100 is a jump of two decimal places to the right.
Multiplying by 1000 is a jump of three decimal places to the right.
And so on.
Dividing is going the other way.
Dividing by 10 is a jump of one decimal place to the left.
Dividing by 100 is a jump of two decimal places to the left.
Dividing by 1000 is a jump of three decimal places to the left.
And so on.
In short, the number of zeroes in 10, 100, 1000 or 10000... determines the number of places the decimal point moves. Multiplying means the decimal point moves towards the right. Dividing means the decimal point moves towards the left.
Here, 0.04 is to be multiplied by 100. Observe that 100 contains two zeroes, so multiplying by 100 means the decimal moves two spaces to the right.
0.04 becomes 00.4, then 004. which equals 4.
Here, 0.04 is to be multiplied by 100. Observe that 100 contains two zeroes, so multiplying by 100 means the decimal moves two spaces to the right.
0.04 becomes 00.4, then 004. which equals 4.
360 Tutoring Program